Globe-holder for arc-lamps.



PATENTE-APR.,14.1903. Y

C. E. HARTHAN.

GLOBE HOLDER FOR ARC LAMPS.

APPLICATION FILED UGT. 7, 1899.

N() MODEL.

Fig. 1.

Mtnessen l lrlveeltorjV Chas. E. Hrvtha QUE.

n: :mams Firms co, woToLm-m.. wks-mam, D. c,

\ the negative carbon or electrode.

UNITED STATES*y PATENTA ()EEICE.l

CHARLES E. vHARTHAN,l OE LYNN, MASSACHUSETTS, ASSICNOR To THE' GENERALELECTRIC COMPANY, A CORPORATION OE NEW YORK.

G'LoBE-HoL-'DER'FOR ARC-LAM Ps.

SPECIFICATIONYormng part of vLetters :Patent No. 725,442, dated. April.14, 1903. Application led October 7, 1899.l 'Serial No. 732,844. (Nomodel.)l

To @ZZ whom t may concern:

Beit known that I, CHARLES E. HARTHAN, a

citizen of the United States, residing at Lynn,

county of Essex, State of Massachusetts, have invented certain new anduseful Improvements in Globe-Holders for Arc-Lamps, (Case No. l,363,) ofwhich the following is a specification. y

This invention relates to globe-holders for arc-lamps. Its object is to,simplify and cheapen the construction and permit the globe to bereadily removed or clamped in position.

The invention is particularlyadapted for employment with the innerglobes of inclosed arc-lamps. l

In carrying out the invention I provide a cast-metal support for thebottom of the globe having a recess in the top to receive apacking-washer of tireproof material to make an air-tight joint with thebottom of the globe and a cylindrical recess to form a socket for Thecentral portion of the support is provided with aset-screw to clamp asplit metal sleeve which lines the recess forming a-socket for the neg-Aative electrode. The bottom .of the support y is provided with a slottedextension to. perkss thereto.

mit clampingitto the yoke ofthe lamp-frame. I provide also aclamping-ring madeY of sheet metal and adapted tobe slipped over thesupport, said ring being provided with one or more inwardly-projectingclamping-toes bent up from the body of the blank and coperating with oneor more cooperating clampingtoes on the support to lock the globe` fastThe clamping-ring is also provided with a pair of ears bent up at rightangles threadedpto, receive an adjusting-screw, by which the clamp maybe regulated to release or fasten the globe.

The several features of noveltyof my invention will be hereinafter morespecifically pointed out and will be definitely indicated inthe claims.f

In the drawings, Figure l is a side elevation of a device embodying myimprovements, the globe being indicated in dotted lines. Fig. l2 is asectional viewon a plane atv right angles to that indicated in Fig. l.Fig. 3 is a top plan view. Fig. 4 shows the manner of `tion shown inFig. 5. port is providedwith an-overhanging clampneck of the globe..clamping-ring l1, having a substantially assembling the clamp andsupport, and Fig.

y5 is a sectional view of a modification.

1 and lu represent the side rods ofranarclamp frame, and 2 an insulatedyoke con-` neoting the same. In the central portion of the` yoke ismounted a metal plate or platform 3, provided withl t'wo adjusting-'screws which engage slotted extremities/of the plate "4, the twoends of which-areslotted on opposite sides, asindicated inthedrawings.This plate forms part of fthe globe-support 5 and `may be made kofstampedlsheet metal and .with asplit tube 6, by which the negativeelectrode maybe clamped inthe socket.V The split-'sleeve may be sprungfirmly against the carbon by an adjusting-screw 8, and an independentthumb-screw may be provided, if desired, as indicated at 9 in themodificaing-toe 10, adapted to engage the contracted Iprovide asheetmetal elliptical openingcarrying one or morebent clamping-toes 1212L and twovlugs '13 13a, bent at right angles .to ,the planeof the ringThe cast-metal supand threaded to receive an adjusting-screw v 14, the'end of which turns, freely in a socket` grooved to permit theassembling. lThe two p parts are assembled as indicated in Fig. 4, oneside' of the clamping-ring being placed over the flanged top of thesupport and pushed toward its axis and the., other side lowered i untilthe ring occupies a plane below the bottom of the ange. Theadjusting-screw 14 is then inserted inthel socket in the body portionand V4.the ring-adjusted .1ateral1y,.being guided by two diametricallyopposite lugs cast integrally with the body of the support, as indicatedat 15 l5, Figs. 3 and' 4.

'roo

In the modification shown in Fig. 5 the lugs which receive theadjusting-screw are bent upwardly instead of downwardly, and theadjusting-screw plays into a socket form ed in the anged top of thesupport.

In using tbe clamp the adjusting-screw is turned until the clamping-toesfree the edge of the globe and the latter may be lifted away. The entireglobe and clamp may be removed from the lamp-frame by releasing theplate 4E.

W'hat I claim as new, and desire to secure i extending above theglobe-seat.

A globe-holder for arc-lamps comprising a globe-support provided with aseat for the bottom of the globe, a laterallymovable clamp-ringsupported in guides below the globe-seat, said' ring havingclamping-toes extending above the seat and an adjusting device for thering.

el.. A globe-holder for an arc-lamp comprising a globe-support providedwith a seat for the bottom of the globe, packing to render the jointair-tight, an adjustable clamp-ring movable laterally in guides on thesupport, said ring having clamping -toes extending above the joint toengage the globe.

5. A globe-holder for an arc-lamp, comprising a globe-support having aflanged head to engage the bottom of the globe, a laterallyadjustablering supported in guides on said support, and cooperating clamping-toescarried by the support and ring.

6. A globe-holder foran arc-lamp, comprising a globe-support flanged atthe top and provided with an overhanging clamping edge, alaterally-adjustable ring mounted on said support, anda cooperatingclamp on said ring overhauging the top of the support.

7. A globe-holder foi-an arc-lam p, comprising a flanged support for theglobe-betteln, and a clamping-ring supported below the flange andlaterally adjustable to clamp or release the globe, said ring having onediameter greater than another to permit removal from the support.

8. A globe-holder for au arc-lamp containing a globe-support, guide-lugsthereon, and a laterally-movable clamp-ring supported in said lugshaving clamping-toes projecting above the plane of the globe-seat.

In witness whereof I have hereunto setmy hand this 5th day of October,1899.

CHARLES E. HARTHAN.

Vitnesses:

DUGALD MoKILLoP, CHARLES B. BETHUNE.

